JP3634069B2 - Airbag device for vehicle - Google Patents

Airbag device for vehicle Download PDF

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Publication number
JP3634069B2
JP3634069B2 JP14753296A JP14753296A JP3634069B2 JP 3634069 B2 JP3634069 B2 JP 3634069B2 JP 14753296 A JP14753296 A JP 14753296A JP 14753296 A JP14753296 A JP 14753296A JP 3634069 B2 JP3634069 B2 JP 3634069B2
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JP
Japan
Prior art keywords
airbag
instrument panel
main body
opening
lid portion
Prior art date
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Expired - Fee Related
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JP14753296A
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Japanese (ja)
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JPH09328049A (en
Inventor
和弘 斉藤
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Calsonic Kansei Corp
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Calsonic Kansei Corp
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Priority to JP14753296A priority Critical patent/JP3634069B2/en
Priority to GB9709459A priority patent/GB2314301B/en
Priority to US08/864,561 priority patent/US5871229A/en
Publication of JPH09328049A publication Critical patent/JPH09328049A/en
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Publication of JP3634069B2 publication Critical patent/JP3634069B2/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/215—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member
    • B60R21/2165—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member characterised by a tear line for defining a deployment opening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R2021/161—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by additional means for controlling deployment trajectory

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)

Description

【０００１】
【発明の属する技術分野】
この発明は、合成樹脂で単層に形成したインストルメントパネル本体の背面側所定位置にエアバッグ装置本体が配設され、該エアバッグ装置本体のエアバッグ突出部に対向する前記インストルメントパネル本体の背面に薄肉のヒンジ溝と開裂溝とによってエアバッグ膨出用リッド部が区画形成された車両用エアバッグ装置に関するものである。
【０００２】
【従来の技術】
従来のこの種のものとしては、例えば、実開昭６３ー１０１２５５号公報に記載の図３に示すようなものがある。
【０００３】
図中の符号１はインストルメントパネルであり、エアバッグ飛出開口２を有する合成樹脂製の基板１１と、発泡体で形成された中間層１２と、この中間層１２の表面に形成された塗装膜１３との三層で一体に構成されている。
【０００４】
また、エアバッグ飛出開口２は、その開口２の周縁の三辺を形成する薄肉部１１ａと、その他の一辺１１ｃとで略矩形を呈し、またエアバッグ飛出開口２は、薄肉部１１ａの各辺に沿い且つ中間層１２に向かって突出する突起部１１ｂと、薄肉部１１ｃを覆うように中間層１２の中に介装させた織布１４とを備えている。
【０００５】
一方、エアバッグ飛出開口２に対向するインストルメントパネル１の背面側には、図示省略のエアバッグ装置本体が配設されており、このエアバッグ装置本体に収納されたインフレータの作動によりエアバッグが展開すると、このエアバッグから受ける膨張圧により、基材１１に設けた薄肉部１１ａの各辺が開裂されこの薄肉部１１ａに設けた突起部１１ｂで中間層１２と塗装膜１３とを切り裂く。そして、図中下部の薄肉部１１ｃと織布１４とをヒンジとしてエアバッグ飛出開口２を開成しエアバッグは車室内へと膨出される。
【０００６】
【発明が解決しようとする課題】
しかしながら、このような従来のものにあっては、インストルメントパネル１の断面構造が三層の組合せで構成されているため、材料の種類並びに生産工程が多くコストが高くなるという問題があった。
【０００７】
また、中間層１２内に織布１４を介装させて薄肉部１１ｃのヒンジとしての補強が行なわれているが、この中間層１２は型内へ発泡材料を注入し成形する際、発泡倍率がバラつき不均質に成り勝ちであり、その中間層１２に介装させた織布１４の接着強度にバラつきが発生するという問題があった。
【０００８】
また、単層に形成したインストルメントパネル本体２２においては、このパネル本体２２の背面に形成された薄肉のヒンジ溝２４ａと開裂溝２４ｂとによってリッド部２４が区画形成されているため、表面側から押されたり衝撃を受けたりすると、この溝２４ａ，２４ｂから変形するという新たな問題が生じる虞れがあった。
【０００９】
そこで、この発明は、バラつきなく安定してリッド部の開成ができ、しかもインストルメントパネル本体に表面側から荷重がかかっても変形が防止され、また生産性がよく安価である車両用エアバッグ装置を提供することにある。
【００１０】
【課題を解決するための手段】
上記の目的を達成するために、請求項１に記載された発明は、合成樹脂で単層に形成したインストルメントパネル本体の背面側所定位置に
エアバッグ装置本体が配設され、該エアバッグ装置本体のエアバッグ突出部に対向する前記インストルメントパネル本体の背面に薄肉のヒンジ溝と開裂溝とによってエアバッグ膨出用リッド部が区画形成された車両用エアバッグ装置において、
前記エアバッグ装置本体から膨出するエアバッグが挿通しうる開口部を有し、該開口部周縁を前記リッド部の内側面に当接してなる補強ブラケットであって前記インストルメントパネル本体の前記背面に、前記リッド部よりも前記ヒンジ溝及び前記開裂溝の外側に支持される補強ブラケットを設けたことを特徴としている。
【００１１】
【作用】
請求項１に記載の構成によれば、この補強ブラケットにより、リッド部を区画形成した車両用エアバッグ装置は表面側から押されたり衝撃を受けたりしても変形を防止することができる。 また、この補強ブラケットの開口部は、エアバッグが展開膨張して行くガイドの役目も果たし、エアバッグはリッド部の正常な内面側の位置に当接することができる。
【００１２】
さらに、インストルメントパネル本体は合成樹脂の単層品であるので、射出成形でリッド部の開裂溝とヒンジ溝まで同時に形成でき、成形精度が向上する。
【００１３】
【発明の実施の形態】
本発明の車両用エアバッグ装置の実施の形態を図１及び図２に基づいて説明する。
【００１４】
まず、構成を説明すると図１において、符号２１は車両用エアバッグ装置であり、２２は合成樹脂で単層に成形されたインストルメントパネル本体で、このインストルメントパネル本体２２の助手席側の背面側の所定位置にはエアバッグ膨出用のリッド部２４が設けられている。このリッド部２４は、ヒンジ溝２４と三辺の開裂溝２４ｂに区画されて略矩形に形成されている。
【００１５】
図２（ａ）において、このリッド部２４の三辺を形成する薄肉部である開裂溝２４ｂは正面視略Ｕ字状に形成され、他の一辺であるヒンジ溝２４ａも開裂溝２４ｂと略同様の薄肉部に形成されている。
【００１６】
また、このリッド部２４に設けられた各溝２４ａ，２４ｂの外側近傍には複数のボス部２２ａが突設されている。そして、このボス部２２ａに補強ブラケット２５が締結されている。
【００１７】
この補強ブラケット２５は、インストルメントパネル本体２２と同じ合成樹脂で成形されており、複数の止め孔２５ｂを配設した基部２５ｃと、この基部２５ｃからリッド部２４背面に向けて角錘状に立ち上げたフランジ２５ｄとから構成され、このフランジ２５ｄの先端は、リッド部２４の内側に当接できるように略矩形の開口部２５ａに形成されている。
【００１８】
次に、その作用を図２（ｂ）に基づいて説明する。
【００１９】
エアバッグ装置本体２３の作動によって突出部２３ａからエアバッグ２３ｂが展開すると、このエアバッグ２３ｂは膨張しリッド部２４に圧接してリッド部２４の開裂溝２４ｂを開裂（Ｉ段階）させ、エアバッグ２３ｂはさらに膨張してリッド部２４を押し広げ（ＩＩ段階）、さらにエアバッグ２３ｂは膨張してヒンジ溝２４ａをヒンジとしてリッド部２４を開成させて車室内に膨出（ＩＩＩ段階）する。
【００２０】
この時、補強ブラケット２５の基部２５ｃはボス部２２ａに締結され、このブラケット２５の開口部２５ａはヒンジ溝２４ａと開裂溝２４ｂとの内側に位置しているので、展開されたエアバッグ２３ｂは、補強ブラケット２５のフランジ２５ｄ部によって開口部２５ａへとガイドされ、エアバッグ２３ｂは開口部２５ａからリッド部２４の背面を確実に圧接することになる。
【００２１】
なお、合成樹脂で単層に形成されたインストルメントパネル本体２２としては、例えば、ポリプロピレン樹脂に添加物を混入して引張強度、低温衝撃性ないしは曲げ剛性や耐熱性等を向上させて複合樹脂材料としたものを射出成形法により成形したものが考えられる。
【００２２】
【発明の効果】
以上説明してきたように、請求項１に記載された発明は、前記エアバッグ装置本体から膨出するエアバッグが挿通しうる開口部を有し、該開口部周縁を前記開口溝で区画される前記リッド部の内側面に当接してなる補強ブラケットが設けられたことにより、車両用エアバッグ装置の表面側から押されたり衝撃を受けたりしても、補強ブラケットが当接しているので変形が止められる。また、この補強ブラケットの開口部はエアバッグが展開膨張して行くガイドにもなり、リッド部背面を正確に圧接することができ正規の開成につなげる役目を果たす。
【００２３】
さらに、リッド部はインストルメントパネル本体と一体の合成樹脂の単層品で形成されているいるので、一回の射出成形によりリッド部の開裂溝やヒンジ溝とを同時に形成でき成形精度がよい。したがって、リッド部の開成精度も向上し安定したものとなる。
【００２４】
また、インストルメントパネル本体は、リッド部が一体でかつ全て単一材料で成形されているので経年後のリサイクル品としての回収も行い易い。
【図面の簡単な説明】
【図１】本実施の形態に係わる車両用エアバッグ装置の斜視図である。
【図２】（ａ）は、同実施の形態に係わる補強ブラケット（斜視図）のリッド部への固着状態を示す図１のＡ−Ａ線断面での説明図である。（ｂ）は、リッド部の開成状況の説明図である。
【図３】従来例を示すインストルメントパネルの要部断面図である。
【符号の説明】
２１…車両用エアバッグ装置
２２…インストルメントパネル本体
２３…エアバッグ装置本体
２３ａ…エアバッグ突出部
２４…リッド部
２４ａ…ヒンジ溝
２４ｂ…開裂溝
２５…補助ブラケット
２５ａ…開口部[0001]
BACKGROUND OF THE INVENTION
According to the present invention, an airbag apparatus main body is disposed at a predetermined position on the back side of an instrument panel main body formed in a single layer with a synthetic resin, and the instrument panel main body of the instrument panel main body is opposed to an airbag protrusion of the airbag apparatus main body. The present invention relates to an airbag apparatus for a vehicle in which an airbag inflating lid is defined by a thin hinge groove and a cleavage groove on the back surface.
[0002]
[Prior art]
As this type of conventional one, for example, there is the one shown in FIG. 3 described in Japanese Utility Model Publication No. 63-101255.
[0003]
Reference numeral 1 in the figure denotes an instrument panel, a synthetic resin substrate 11 having an airbag outlet opening 2, an intermediate layer 12 formed of a foam, and a coating formed on the surface of the intermediate layer 12 Three layers with the film 13 are integrally formed.
[0004]
Further, the airbag ejection opening 2 has a substantially rectangular shape with a thin portion 11a forming the three sides of the periphery of the opening 2 and the other side 11c, and the airbag ejection opening 2 is formed of the thin portion 11a. Protruding portions 11b that protrude along the respective sides and toward the intermediate layer 12 and a woven fabric 14 interposed in the intermediate layer 12 so as to cover the thin portion 11c are provided.
[0005]
On the other hand, an airbag device body (not shown) is disposed on the back side of the instrument panel 1 facing the airbag outlet opening 2, and the airbag is operated by the operation of the inflator housed in the airbag device body. When the air bag is deployed, each side of the thin portion 11a provided on the base material 11 is cleaved by the inflation pressure received from the airbag, and the intermediate layer 12 and the coating film 13 are cut by the projection portion 11b provided on the thin portion 11a. Then, the airbag discharge opening 2 is opened with the thin-walled portion 11c and the woven fabric 14 at the lower portion in the figure as hinges, and the airbag is inflated into the vehicle interior.
[0006]
[Problems to be solved by the invention]
However, in such a conventional apparatus, since the cross-sectional structure of the instrument panel 1 is configured by a combination of three layers, there is a problem that the number of types of materials and production processes are large and the cost is high.
[0007]
In addition, the woven fabric 14 is interposed in the intermediate layer 12 to reinforce the hinge of the thin portion 11c. The intermediate layer 12 has a foaming ratio of a foaming material injected into the mold and molded. There is a problem that the unevenness tends to be uneven and the adhesive strength of the woven fabric 14 interposed in the intermediate layer 12 varies.
[0008]
Further, in the instrument panel main body 22 formed in a single layer, the lid portion 24 is defined by the thin hinge groove 24a and the cleavage groove 24b formed on the back surface of the panel main body 22. When pressed or impacted, there is a possibility that a new problem of deformation from the grooves 24a, 24b may occur.
[0009]
Accordingly, the present invention provides a vehicular airbag apparatus that can stably open a lid portion without variation, and that is prevented from being deformed even when a load is applied to the instrument panel body from the surface side, and that is highly productive and inexpensive. Is to provide.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, according to a first aspect of the present invention, there is provided an airbag apparatus main body disposed at a predetermined position on the back side of an instrument panel main body formed of a synthetic resin in a single layer. In the vehicle airbag device in which an airbag inflating lid is defined by a thin hinge groove and a cleavage groove on the back surface of the instrument panel body facing the airbag protrusion of the body,
The back of the instrument panel main body is a reinforcing bracket having an opening through which an airbag that bulges from the main body of the airbag device can be inserted, and a periphery of the opening abutting against an inner surface of the lid portion. Further, the present invention is characterized in that a reinforcing bracket that is supported on the outer side of the hinge groove and the cleavage groove than the lid portion is provided.
[0011]
[Action]
According to the configuration of the first aspect, even if the vehicle airbag device having the lid portion defined by the reinforcing bracket is pressed from the surface side or receives an impact, the reinforcement bracket can prevent deformation. The opening of the reinforcing bracket also serves as a guide for the airbag to expand and inflate, and the airbag can abut on the normal inner surface side position of the lid portion.
[0012]
Furthermore, since the instrument panel main body is a single layer product of synthetic resin, it is possible to simultaneously form the tear groove and the hinge groove of the lid portion by injection molding, and the molding accuracy is improved.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a vehicle airbag device of the present invention will be described with reference to FIGS. 1 and 2.
[0014]
First, the configuration will be described. In FIG. 1, reference numeral 21 denotes a vehicle airbag device, 22 denotes an instrument panel main body molded in a single layer from a synthetic resin, and the rear surface of the instrument panel main body 22 on the passenger seat side. A lid portion 24 for inflating the airbag is provided at a predetermined position on the side. The lid portion 24 is partitioned into a hinge groove 24 and a three-side cleavage groove 24b and is formed in a substantially rectangular shape.
[0015]
In FIG. 2A, the cleavage groove 24b, which is a thin portion forming three sides of the lid portion 24, is formed in a substantially U shape when viewed from the front, and the hinge groove 24a, which is the other side, is substantially the same as the cleavage groove 24b. It is formed in the thin part.
[0016]
A plurality of bosses 22a project from the vicinity of the outer sides of the grooves 24a and 24b provided in the lid portion 24. A reinforcing bracket 25 is fastened to the boss portion 22a.
[0017]
The reinforcing bracket 25 is formed of the same synthetic resin as that of the instrument panel main body 22, and stands in a pyramid shape from a base portion 25 c provided with a plurality of retaining holes 25 b toward the back surface of the lid portion 24 from the base portion 25 c. The flange 25d is raised, and the front end of the flange 25d is formed in a substantially rectangular opening 25a so as to be in contact with the inside of the lid portion 24.
[0018]
Next, the operation will be described with reference to FIG.
[0019]
When the airbag 23b is deployed from the protruding portion 23a by the operation of the airbag device main body 23, the airbag 23b is inflated and pressed against the lid portion 24, thereby cleaving the cleavage groove 24b of the lid portion 24 (step I). 23b further inflates and pushes the lid portion 24 (stage II), and the airbag 23b inflates to open the lid portion 24 with the hinge groove 24a as a hinge and bulge into the vehicle compartment (stage III).
[0020]
At this time, the base 25c of the reinforcing bracket 25 is fastened to the boss 22a, and the opening 25a of the bracket 25 is located inside the hinge groove 24a and the cleavage groove 24b. The flange 25d of the reinforcing bracket 25 is guided to the opening 25a, and the airbag 23b reliably presses the back surface of the lid portion 24 from the opening 25a.
[0021]
In addition, as the instrument panel main body 22 formed of a synthetic resin in a single layer, for example, an additive is mixed into polypropylene resin to improve tensile strength, low-temperature impact property, bending rigidity, heat resistance, etc., and composite resin material What was formed by the injection molding method can be considered.
[0022]
【The invention's effect】
As described above, the invention described in claim 1 has an opening through which an airbag bulging from the airbag device body can be inserted, and the periphery of the opening is partitioned by the opening groove. By providing a reinforcing bracket that is in contact with the inner side surface of the lid portion, even if the reinforcing bracket is in contact with the vehicle airbag device even if it is pressed or subjected to an impact, deformation occurs. It can be stopped. The opening of the reinforcing bracket also serves as a guide for the airbag to expand and inflate, so that the back surface of the lid can be accurately pressed and connected to the normal opening.
[0023]
Furthermore, since the lid portion is formed of a single layer product of synthetic resin integral with the instrument panel main body, the cleavage groove and hinge groove of the lid portion can be formed simultaneously by one injection molding, and the molding accuracy is good. Therefore, the opening accuracy of the lid portion is improved and stabilized.
[0024]
Moreover, since the lid part is integrally formed by the single material, the instrument panel main body is easy to collect | recover as a recycled product after many years.
[Brief description of the drawings]
FIG. 1 is a perspective view of a vehicle airbag apparatus according to an embodiment.
FIG. 2A is an explanatory view taken along the line AA of FIG. 1 showing a state in which a reinforcing bracket (perspective view) according to the embodiment is fixed to a lid portion. (B) is explanatory drawing of the opening condition of a lid part.
FIG. 3 is a cross-sectional view of a main part of an instrument panel showing a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 21 ... Vehicle airbag apparatus 22 ... Instrument panel main body 23 ... Airbag apparatus main body 23a ... Airbag protrusion part 24 ... Lid part 24a ... Hinge groove 24b ... Cleavage groove 25 ... Auxiliary bracket 25a ... Opening part

Claims (1)

合成樹脂で単層に形成したインストルメントパネル本体の背面側所定位置にエアバッグ装置本体が配設され、該エアバッグ装置本体のエアバッグ突出部に対向する前記インストルメントパネル本体の背面に薄肉のヒンジ溝と開裂溝とによってエアバッグ膨出用リッド部が区画形成された車両用エアバッグ装置において、
前記エアバッグ装置本体から膨出するエアバッグが挿通しうる開口部を有し、該開口部周縁を前記リッド部の内側面に当接してなる補強ブラケットであって前記インストルメントパネル本体の前記背面に、前記リッド部よりも前記ヒンジ溝及び前記開裂溝の外側に支持される補強ブラケットを設けたことを特徴とする車両用エアバッグ装置。An airbag device body is disposed at a predetermined position on the back side of the instrument panel body formed of a single layer with a synthetic resin, and a thin wall is formed on the back surface of the instrument panel body facing the airbag protruding portion of the airbag device body. In the vehicle airbag device in which the airbag inflating lid is defined by the hinge groove and the cleavage groove,
The back of the instrument panel main body is a reinforcing bracket having an opening through which an airbag that bulges from the main body of the airbag device can be inserted, and a periphery of the opening abutting against an inner surface of the lid portion. Further, the vehicle airbag apparatus is provided with a reinforcing bracket that is supported on the outer side of the hinge groove and the cleavage groove than the lid portion .
JP14753296A 1996-06-10 1996-06-10 Airbag device for vehicle Expired - Fee Related JP3634069B2 (en)

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JP14753296A JP3634069B2 (en) 1996-06-10 1996-06-10 Airbag device for vehicle
GB9709459A GB2314301B (en) 1996-06-10 1997-05-08 Automobile airbag device
US08/864,561 US5871229A (en) 1996-06-10 1997-05-28 Automobile airbag device

Applications Claiming Priority (1)

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JP14753296A JP3634069B2 (en) 1996-06-10 1996-06-10 Airbag device for vehicle

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JPH09328049A JPH09328049A (en) 1997-12-22
JP3634069B2 true JP3634069B2 (en) 2005-03-30

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GB2314301A9 (en) 1998-01-08
GB9709459D0 (en) 1997-07-02
GB2314301A (en) 1997-12-24
GB2314301B (en) 2000-08-16
JPH09328049A (en) 1997-12-22
US5871229A (en) 1999-02-16

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